Can-cap.



'NQ.69?1175,'V p PATENTED JULY 14', 1908.4

G; LAUTBRBAGK. v

GAN GAP.. APPLICATION FILED MAY, 1906.

Ill Illa] GEORGE LAUTERBAGK, OF BALTIMORE, MARYLAND.

CAN-GAP,

Specification of Letters Patent.

Patented July 14, 1908.

Application filed May 5, 1906. Serial No. 315,275.

To all whom it may concern:

Be it known that I, GEORGE LAUTERBACK, a citizen of the United States, residing at Baltimore, in the State of Maryland, have invented certain new and useful Improvements in Can-Caps, of which the following is a specif ication.

This invention relatesto a can-cap provided with solder.

The ordinary tin-can used for hermetically sealing fruits, vegetables and other foods has a circular top-opening, which is closed after the can has been'iilled by caps of the character here referred to. There is a recognized advantage in affixing to these can-caps the exact quantity of solderthat should be used to secure the cap to the can-top.

The object of the present invention is to provide an improved ready-soldered cap for closing filled cans.

The invention is illustrated in the drawing, in which,--

Figure 1 is a diametrical section of the cancap before the solder is applied. Fig. 2 is a top view of the same. Fig. 3 is a top view of the ready-soldered can-cap. Fig. 4 is a section of the cap showing the solder afliXed-to it. Fig. 5 is a section view of a can-top show ing the opening that is to be closed by the cap.

The letter, a, designates a portion of the wall of a tin-can; b, the top of the vcan c, the opening in the top and, d, an upturned flange surrounding the edge of the opening. Adjoining and around this up-turned flange of the can-top is a depression, e, which constitutes the annular groove of the ordinary can. This groove in cross-section is approximately V-shaped. l

The cap, F, is provided with the usual central vent hole, g, and thedown-turned rim, 71., has a pitch or angle position that corresponds with the up-turned position of the flange, d, on the can-top, so that when the cap is placed over the can-top opening to close the latter said down-turned rim, h, and up-turned flange, d, will contact. The cap also has around the said rim an up-turned lip, fi, whose pitch or inclination corresponds with the pitch of the annular depression, e. In

' will cross-section the rimedge of the cap has the form of a V and the lower surface of the upturned lip, i, contacts with one side of the upper surface of the depressed annular y groove, e,'of the can-top. The up-turned lip,

i, forms on top of the cap an annular gutter, j, adjacent the peripheral edge. This cap has its supply of solder attached partly in the l top annular gutter, y', where the solder is fused and designated in the drawing by the letter, k, partly on the peripheral cut-edge which is thinly coated with solder, and partly on the lower inclined surface of the upturriced lip, i, which is coated with solder, as at, l.

A tin cap having the annular gutter vadjacent its rim wherein the solder is fused, and the up-turned lip around the rim coated with solder on its lower inclined surface, constitutes an article possessing practical advantages. When a heated soldering tool is brou ht into operation on this cap, its edge Fit into the annular gutter, y', and melt the solder and cause it to overflow the rimedge of the lip, i, into the annular depression, e, of the can-top and the fused solder will make a tight joint between the cap and cantop.

I claim as new and desire to secure by Letters Patent is,-

1. A can-cap consisting of a metal plate having a down-turned rim provided with an up-turned lip around the rim which forms a top annular gutter, and a solder filling in said top gutter and covering the edge of the upturned lip and also coated on the lower inclined surface of said up-turned lip.

2. A cap for closing the top-opening of tin cans, consisting of a metal disk having around its circumferential rim an up-turned lip edge which in cross-section has a V-shaped form, and solder fused on top of the disk and around said lip edge.

In testimony whereof I affix Amy signature in presence of two witnesses.

GEORGE' LAUTERBAOK. Witnesses:

OHAs. B. MANN, JOHN W. HEwEs.

HavingI thus described my invention what 

